I can`t hear my PC `s Sound sometimes At First i can able to hear then suddenly mutes and unmutes

[Palam]

I can`t hear my PC `s Sound sometimes At First i can able to hear then suddenly mutes and unmutes and then again mutes and keeps on going like this 

But HP Support Assistant shows that i am Up to Date 

so what to do now to rectify this issue

[itsmyname]

@Palam -- are you using the "built-in" speakers of your All-In-One, or have you connected external speakers to your computer?

How old is the computer? The HP Warranty might still be active, allowing you to ask HP Support to repair/replace your computer.